InHand RS-CO2 WS-N01 User manual

RS-CO2 WS-N01

CO2 temperature and

humidity transmitter

Operation instruction

(RS485 type)

Document version: V1.2

2 
 
 Context 
1.
 
Product Introduction .......................................................................................................... 2 
1.1
 
Product summary ........................................................................................................ 2 
1.3
 
Main technology parameter ......................................................................................... 3 
1.4
 
System frame diagram ................................................................................................. 3 
2.
 
Device Installation Instruction ........................................................................................... 3 
2.1
 
Check before the device installation ........................................................................... 3 
2.2
 
Joggle instruction ........................................................................................................ 4 
2.3
 
485 field wiring instructions ....................................................................................... 4 
3.
 
Configuration Software Installation and Application ...................................................... 4 
3.1
 
Software selection .................................................................................................... 4 
3.2
 
Parameter setting ......................................................................................................... 4 
4.
 
Communication Agreement ................................................................................................ 5 
4.1
 
Communication basic parameter ................................................................................. 5 
4.2
 
The concept of data frame format ............................................................................... 6 
4.3
 
Register address .......................................................................................................... 6 
4.4
 
Communication agreement example and explaining .................................................. 8 
4.4.1
 
For example： .......................................................................................................... 8 
4.4.2
 
For example： .......................................................................................................... 8 
5.
 
Common Problem and Solution ......................................................................................... 9 
6.
 
Document History ............................................................................................................... 9 
7.
 
Shell Size ............................................................................................................................ 10 
 
1.
 
Product Introduction 
1.1 Product summary 
The transmitter is widely used in communication room, warehouse buildings and automatic 
temperature and humidity monitoring needs of the place, the sensor input power, temperature 
measurement unit, the signal output is completely isolated from three parts. Safe, reliable, 
beautiful appearance, easy installation.

1.2 Function feature

This product uses high sensitivity gas detection probe, signal stability, high precision. With a

wide measuring range, good linearity, easy to use, easy to install, transmission distance and so on.

1.3 Main technology parameter

Power supply: 10 ~ 30V DC average current: <85mA

CO2 Measurement range: 0 ~ 5000ppm (can be customized)

Accuracy of CO2: ± (40ppm + 3% F · S) (25

℃

)

Temperature measurement range: -40

℃

~ 80

℃

Temperature accuracy: ± 0.5

℃

Humidity measurement range: 0 ~ 100% RH Humidity accuracy: ± 3% RH

Stability: <2% F · S Nonlinearity: <1% F · S

Data Update Time: 2s Warm-up time: 2min (available), 10min

(maximum precision)

Temperature effects: comes with temperature Output signal: 485, relay (optional)

Compensation

1.4 System frame diagram

Device Installation Instruction

2.1 Check before the device installation

Device list:

■

One transmitter equipment

■

Certificate, warranty card, and after sales service card and so on

■

one 12V/2A waterproof power (select)

■

USB transfer to 485 (select)

2.2 Joggle instruction

Range 10V-30V of wide voltage is available in power input, the A wire and B wire cannot be

connected contrary when connecting to 485 signals, and the address among several devices on the

total wire cannot be conflicted.

Line color

Description

power

brown

Power supply is (10 ~ 30V DC)

black

Power supply negative

Communication

yellow

485-A

blue

485-B

2.3 485 field wiring instructions

Multiple 485 models of equipment access the same bus, the field wiring has certain

requirements, please refer to the specific parameters

Test data packets in the "485 device field wiring manual."

Configuration Software Installation and Application

3.1 Software selection

Opening the datagram, and choosing “test software” ---- “485 parameter setting software”

and finding out and opening it.

3.2 Parameter setting

① select the right COM port (“my computer——properties——deceive manager——Port”)

and check the COM port from the Port, the name of several different kinds of 485 transmitter drive

② connect with only one device and be powered, and click “test the baud rate” of the

software to test the device baud rate and address, the default baud rate is 4800bit/s and default

address is 0x01

③change the address and baud rate based on the application requirement, and

meanwhile the current situation of the device function can be checked

④if the test is not success, please check the device wring and 485 drive installation

situations again

Communication Agreement

4.1 Communication basic parameter

Code

bit

binary

system

Data Bit

Parity bit

None

Stop Bit

1bit

Error check

CRC（Redundant cyclic codes）

Baud Rat

2400bit/s, 4800bit/s, 9600 bit/s options, the factory default 4800bit/s

4.2 The concept of data frame format

Apply Modbus-RTU communication rules, the format below：

Initial structure ≥4 byte time

Address code = 1 byte

Function code = 1 byte

Data area = N byte

Incorrect revision = 16 byte CRC code

Ending structure ≥4 byte time

Address

code

：

the

address

the

transmitter

，

and

will

the

only

(factory

default

0x01)

the

communication

net.

Function code ： the order function orders from host computer; this transmitter only uses function code

0x03(reading register date).

Data area：data area is the specific communication data, attention16bits data high byte in front!

CRC codetwo-byte revision code.

Main computer enquires frame structure

Addr

ess

Code

Functi

Code

Address

Length

Revision Code

in Low

Position

Revision

Code

in High

Position

1byte

2bytes

1byte

Accessorial computer replying frame structure：

Addres

s Code

Func

tion Code

Effectiv

ness Byte

NO.

Data

Area One

Data Are

a Two

Data Area

Revision

Code

1byte

2bytes

4.3 Register address

PLC or

Content

Operati

Scope and definition

Address

Configuration

Address

ion

of the definition

0000 H

40001

Temperature

Read

only

0~1000

0001 H

40002

humidity

Read

only

-400~1000

0002 H

40003

CO2

concentration

Read

and write

0~5000

0030 H

40049

Temperature

upper limit alarm

value

Read

and write

-400~1000

0031 H

40050

Temperature

lower limit alarm

value

Read

and write

-400~1000

0032 H

40051

Temperature

alarm back to the

difference

Read

and write

0~1000

0033 H

40052

Temperature

calibration value

Read

and write

-400~1000

0034 H

40053

The

temperature relay

is enabled

Read

and write

1 is enabled, 0 is

disabled

0035 H

40054

High

humidity alarm

value

Read

and write

0~1000

0036 H

40055

Low alarm

value of humidity

Read

and write

0~1000

0037 H

40056

Humidity

alarm back to the

difference

Read

and write

0~1000

0038 H

40057

Humidity

calibration value

Read

and write

-400~1000

0039 H

40058

The

humidity relay is

Read

and

1 is enabled, 0 is

disabled

enabled

write

003a H

40059

CO2 high

alarm value

Read

and write

0~5000

003b H

40060

CO2 lower

limit alarm value

Read

and write

0~5000

003c H

40061

CO2 alarm

back to the

difference

Read

and write

0~5000

003d H

40062

CO2

calibration value

Read

and write

-2000~2000

003e H

40063

CO2 relay is

enabled

Read

and write

1 is enabled, 0 is

disabled

0040 H

40065

Relay Status

Read

and write

1 for the suction, 0

for the disconnect

4.4 Communication agreement example and explaining

4.4.1 For example: Read the CO2 value at device address 0x01

enquiry frame：

Address

Code

Function

Code

Start

Address

Data

Length

Check Dig

Low

Check Digit

High

0x01

0x03

0x00 0x0

0x00 0x01

0x25

0xCA

Replication frame： (For example, read CO2 to 3000 ppm）

Addres

Code

Functio

Code

Returns the

number of valid bytes

Light

intensity

value

Check

digit

low

Check

digit high

0x01

0x03

0x02

0x0B 0xB8

0xBF

0x06

CO2：

BB8 H (Hex) = 3000 => CO2 = 3000 ppm

4.4.2 For example：Read the CO2 with Temperature and humidity value at device

address 0x01

enquiry frame：

Address

Code

Function

Code

Start

Address

Data

Length

Check Di

git

Check Digit

High

Low

0x01

0x03

0x00 0x0

0x05

0xCB

Replication frame： (when reading temperature is -7.5℃，humidity is 35.9%RH,

CO2 is 3000ppm）

Address

Code

Function

Code

Valid

bytes

Humidity

value

Temperature

value

CO2

value

Check

digit low

Check

digit high

0x01

0x03

0x06

0x01 0x67

0xFF 0xB5

0x0B 0xB8

0x33

0xDC

Common Problem and Solution

Device cannot be connected with PLC or computer

Reasons possible:

Several COM ports in the computer, the port be chosen is incorrect.

The device address is wrong, or some device addresses are repeat.(all factory defaults

are ).

Baud rate, revision mode, data position and stop position are wrong.

The main computer and polling interval is too small and time waiting for replying is too

short, and all need to set over 200ms.

The 485 general wire is broken or the A wire and B wire are connected in the wrong side.

To many devices or too long wires, the power needs to be chosen nearby, add 485

intensifiers, and add 120Ω

terminal electric resistance.

The driver of USB transfer to 485is not installed or damaged.

The device is broken.

Document History

V1.0 Document building.

V1.1 add a variety of card rail shell.

V1.2 increase wiring rules and solutions to common problems.

Shell Size

The overall size: 110 × 85 × 44mm

InHand RS-CO2 WS-N01 User manual

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